Abstract: A hand tool is provided for the application of joint compound to drywall board joints, a planar blade affixed to a handle. The blade has a concave arcuate working edge, wherein the concave arcuate curve extends the entire length of the working edge to each corner of the working edge. The concave arcuate working edge may be used to apply a self-featured layer joint compound over drywall tape on planar butt joint or an inside corner joint. The blade is laterally flexible.